Coal-separator



W. M. MAcFARLANE.

COAL SEPARATOR.

APPLICATION FILED MAR. 30, 1911.

Patented July 6, 1920.

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COAL SEPARATOR.

APPLICATION FILED MAR. 30, I9I7.'

Patented ly 6, 1920.

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' COAL SEPARATOR.

APPLICATION FILED MAR.301i9I7.

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WILLIAM M. MACFARLANE, or soRAN'roN, PENNSYLVANIA.

ICOAL-SEPARATOR.

To all whom it may concern Be it known that I, WILLIAM M. MACFAR- LANE, a citizen of the United States,'residing at Scranton, county of Lackawanna, and

State of Pennsylvania, have invented cera coal screening device which shall be rapid and thorough in its work. A further object of my invention is to provide in a coal.

. screening device means for imparting to the screens or sieves, a motion similar'to that given to a screen by an expert hand operator. A further object of my invention is to provide in a device of the class mentioned improved supporting means for the screens. A further object'of my invention is to provide in a device of the class mentioned, means to prevent the coal passing from the ends of the screen from coming into contact with the bearing or supporting elements. Other objects will appear hereinafter.

With these objects in view my'invention consists generally'in a screen supported upon trunnions, said trunnions being horizontally movable transversely of their arms and means in which the screens slope from one end to I the other and further characterized by a guide or fender secured upon the face of the screen to prevent the coal passing from the screen into'contact with the adjacent trun-' nion and its bearings. inventionfurther consists in various details of construction and arrangements of parts all as will be fully described hereinafter and particularly pointed out in the claims. 7

My" invention will be more readily understood by reference 'to the accompanying 1 Specification of Letterslatent.

drawings, forming a part of this specification, and in which- Figure lis an end elevation of a coal screening device embodying my invention, the trunnion bearings being-shown in section, l c

Fig. 2 is a transverse section on substantially the line-ww of Fig. 1, i

Fig. 3 is a diagrammatic plan View of the device, portions being broken away and the bearings being omitted, i v

I Fig. 4 is a detail section taken on substantially the line Q of Fig. 2 and illustrated upon an enlarged scale,

Fig. 5 is a detail perspective view of one of 'the trunnions, and.

' Fig. 6 is a detailview illustrating a modified manner of supporting the screens.

. V In the drawings I haveillustrated thedevice as comprising two similar screening elements each formed of a plurality of separate super-imposed screens or decks but it will be obvious that any number of screening elements may be employed from one up-' Patented July 6, 1920. Application filed. March 30, 1917. Serial No. 158,543;

similar a detailed description of one will suffice for both.

Each of the above mentioned screening elements comprises a plurality of decks 1 each formed of a suitable screen 2' and a,

pair oflongitudinally disposed side timbers 3 to which the screens proper are secured. These members are supported upon transverse members or angle irons 4 which in turn are secured at their ends to vertical-elements or angle bars 5 arranged at the corners of the device; The vertical corner elements 5 and the transverse supporting elements 4 securedthereto together with themembers 3 constitute a rigid frame. Itshould be noted that the members 3' and the screens supported thereby are arranged at'a slight inclination so that upon vibration of the screen,

the coal will pass from the upper to the. lower end thereof, the latter end being open to allow the coal to pass freely therefrom.

The screeningelements above described are supported at theirend's upon trunnions 6 and these trunnions'arepreferably ar ranged at substantially the center of the ends ofgthe screens for a purpose hereinafter described. Each trunnion is provided with a base plate 7 formed with lateral flanges 8 which are secured toangle irons 9, the latter in turn being secured as by riveting to the transverse frame members 4:.

Various means may be employed for supporting the trunnions and in Figs. 1 and 2 I have shown the trunnions with their ends arranged in suitable bearing boxes 10 and also equipped with spring hangers 11 but it is evident that either of these may be employed independently of the other, that is, either the boxes 10 or the hangers 11 may be dispensed with; and in Fig. 6 I have illustrated an'arrangement whereby the boxes 10 alone are used. v Y

The bearing boxes are supported upon suitable timbers 12 and are provided with a suitable run-way 13. Surrounding the trunnion and resting upon the run-way 13 is an anti-friction ring 14, ball bearings 15 being interposed between said ring and said trunnion. A cap plate 16 holds the antifriction ring in engagement with the runway 13. At the lower end of the screen the trunnion and its bearing box must be protected from coal or dirt from entering the same from the screen and to this end the face of the box adjacent the screen is provided with a closure 17 slidably mounted in Ways 18 formed upon the box and the cap plate 16, the trunnion 6 passing snugly through an aperture in said plate. Preferablythe trunnion is provided with a reduced portion 19 to receive the plate.

The hangers 11 each comprise a bearing sleeve 20 supported by a pair of spring planks 21 depending from suitable supporting members such as timbers 22 to which they are securely bolted. These elements not only assist in supporting the screens when employed, but also serve as springs to assist in the operation of the device as will appear more clearly hereinafter. V

Arranged adjacent the screen elements, and between the same if arranged in pairs, as shown in the drawings, is an operating shaft 28 which is driven by any suitable means not shown. Arranged on said shaft are a plurality of eccentrics 24 which are coupled in pairs to the sides of the screens adjacent their ends as shown clearly in Fig.

3. The eccentric straps 25 of the eccentrics are provided with the pitmen26 which are secured to the frame members 5 or to members 27 secured to the screen frames.

In order to prevent the coal as it passes from the end of the screen fromcoming into contact with the adjacent bearings, a V- shaped member 28 is fixed to the several screens 2 as shown clearly in Fig. 3. This fender or guide directs the coal to the sides of the screen and away from the center as is obvious.

It is obvious that upon rotation of, the

shaft 23 the screens will be given a transverse reciprocatory motion and at thesame timean oscillatory motion with the trunnions 6 as an axis. This will give the combined lateral and oscillatory motion to the screens which is similar to the motion given to a hand screen by an expert operator and 1s a motion which has been proven to be most efficacious in rapidly and thoroughly screen- .ing the coal.

super-imposed screens.

I claim: I

1. In a device of the class describecha screen, trunnions at the ends of said screen intermediate thetop and bottom thereof, bearings for said trunnions permitting both transverse and oscillatory movement and means for'impartin'g transverse and oscilla tory movement to said screen, substantially as described.

2. In a device ofthe class described, a screen, trunnions at the ends of said screen intermediate the top and. bottom thereof, abearing box for said trunnions permitting transverse movement thereof and means for imparting transverse and stantially its-described] r 3. In a device of the class described, a screening element con'lpiising aplurality of superimposed screens rigidly connected, trunnions fixed to the-ends of said screening element intermediate thetop and bottom thereof, bearings for said trunnions and means for imparting a combined transverse and oscillatory movement to said screens, substantially as described.

4. In a device of the class described, a screen inclined from end to end, trunnions arranged at the ends of said screen intermediate the top and bottom thereof, bear ings for said trunnions permitting both transverse and oscillatory movement thereof, means for imparting transverse and oscillatory movements to said screen, and means on said screen fordirecting the material passing from the end thereof away from the adjacent trunnion and bearing, substantially as described. Y

The combination as set forth in claim 4 together with an anti-frictionv ring interposedbetween each of said trunnions and its respectivebearing, substantially as described.

6. In a device or the as. described, a.

screen inclined from. end togend, trunnionsv 100 oscillatory movement to said screen, subat the ends of said screen intermediate the top and bottom thereof, bearings for said trunnions, a rotary shaft parallel with the axis of said trunnions, eccentrics on said shaft and eccentric straps rigidly connected to said screen, substantially as described.

7. In a device of the class described, a screen inclined from end to end, trunnions at the ends of said screen intermediate. the top and bottom thereof, bearings for said trunnions, a rotary shaft parallel with the axis of said trunnions, eccentrics on said shaft and eccentric straps rigidly connected to said screen adjacent the ends thereof,

substantially as described.

8. In a device of the class described, a pair of screening elements each comprising a plurality of super-imposed substantially parallel screens rigidly connected, said screens being inclined from end to end, trunnions fixed to said screening elements at substantially the center of the ends thereof, bearings for said trunnions permitting both lateral and transverse movement, a shaft arranged between said screening elements, eccentrics on said shafts and eccentric straps thereon rigidly connected to said screening elements, as and for the purpose specified.

9. The combination as set forth in claim 8 together with V-shaped guides arranged upon the faces of the several screens at their lower ends to direct the material passing from the screens away from the trunnion bearings, substantially as described.

10. In a'device of the class described, a screening element, trunnions on said element, boxes to receive the said trunnions and permit lateral movement thereof, antifriction ringson said trunnions within said boxes and means for imparting a combined lateral and oscillatory movement to said screening element, substantially as described.

11. The combination as set forth in claim 10 together with spring hangers supported above said screening element and provided with bearing sleeves engaging a portion of said trunnions, substantially as described.

12. In a device of the class described, a screening clement, trunnions on said element, boxes to receive said trunnions and permit lateral movement thereof, antifriction members on the said trunnions Within said boxes, a sliding closure for each of said boxes, said trunnions projecting through apertures in said closure, and means for imparting a combined lateral and oscillatory movement to said screening element, substantially as described.

13. The combination as set forth in claim 12 further characterized by guides arranged upon the screening element to direct material away from said trunnions and boxes, substantially as described.

14:. The combination as set forth in claim 12 further characterized by guides on said boxes for said sliding closures.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

YVILLIAM M. MAOFARLANE.

Witnesses LAURA MAOFARLANE, GEORGE MACFARLANE. 

